Valve-actuating means for blowing-engines.



- Patented Feb. l8, I902. C. 0. LINDROTH. VALVE AGTUATING MEANS FORBLOWING ENGINES. (Application flled Mar. 8, 1900.) (No Model.)

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- Patented Fh. l8, I902. C. 0. LINDROTH. VALVE ACTUATING MEANS TORBLOWING ENGINES.

(Application filed Mar. 8. 1900.)

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CARL O. LINDROTH, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THESOUTIIl/VARK FOUNDRY c MACHINE COMPANY, OF PHILADELPHIA, PENN- SYLVANIA,A CORPORATION OF PENNSYLVANIA.

VALVE AOTUATENG MEANS FOR BLOWING=ENGKNES.

SPECIFICATION forming part of Letters Patent No. 693,614, dated February18, 1902.

Application filed March 8, 1900. Serial No. 7,833- (No model.) a

To all whom it may concern.-

Be it known that I, CARL O. LINDROTH, a citizen of the United States ofAmerica, residing in the city and county of Philadelphia, in

the State of Pennsylvania, have invented certain new and usefulImprovements in Valve- Actuating Mechanism for Blowing-Engines, of whichthe following is a true and exact description, reference being had tothe accompanyin g drawings, which form a part thereof.

My invention relates to blowing-engines, and particularly to themechanism fol-actuating the admission-valves in such engines, my objectbeing to provide a simple and efficient device for opening and closingthe admissionvalves with great rapidity and precision of movement and adevice which will occupy a comparatively small space.

The nature of my improvements will be best 2o understood as described inconnection with the drawings, in which they are illustrated, and inwhich- Figure 1 is a side elevation of a blowing-engine provided with myvalve-actuating mechanism. Fig. 2 is a plan view of the lower head ofthe compressing-cylinder,sho win g the valves and valve-actuatingconnections, the parts being shown as on the section-line 2 2 of Fig. 1.Fig. 3 is a View of the admissionvalve,actuating-cams .and connectionsshown in the same section as Fig. 2, but on a larger scale. Fig. 4 is anelevation of the cams and their immediate connections, partly shown insection on the line at a of Fig. 3. Fig. 5 is a cross-section throughthe lower end of the compressing-cylinder and its head, taken as on theline 5 5 of Fig. 2, but shown on a reduced scale. Fig. 5 is an enlargedview of the detail shown in Fig. 5, and Fig. 6 is a sectional plan viewtaken on the line 6 6 of Fig. 5.

Aindicates the frame of the blowing-engine, B the steam-cylinder, and Cthe compressingoylinder.

D is the piston-rod,connecting with the pistons (not shown) in the steamand air compressing cylinders.

D is a downward extension of the pistonrod connected by theconnecting-rod D with the crank-pin E,connectedfllirough the crankdisksE, with the main shaft of the engine, (indicated at E.)

F and f indicate, respectively, the lower and upper heads of thecompressing-cylinder.

F indicates the seat for the ad mission-va1ve, 5 5 which is of thegridiron type, the cross-bars being indicated atf, the seat for thevalve being arranged so that the face of the valve will be turnedoutward from the cylinder.

F indicates an opening through the head of the cylinder in which issecured the seat for the delivery-valve.

F indicates the flanged walls of the headcasting, which surround theadmission-valve, and F indicates the receiver,which surrounds and coversthe delivery-valve, 13 indicating cross-bars extending across thereceiver in front of the delivery-valves, and F the connectionsof thereceivers at top and bottom with the common receiving-pipe F".

F F indicate openings formed in the top of the receiver opposite to thedelivery-valves, which in use are covered by plates or caps.

F indicates a cylindrical opening in the lower cylinder-head, throughwhich the piston-rod passes.

G (best shown in Fig. 5*) is the back bearing for the admission-valve,which back bearing is secured in place by a series of bolts (indicatedat G) threaded at both ends, as indicated at G and Cr, and formed with aflange G intermediate of its ends, which when the end G is screwed intothe back bearing G enters and rests against the bottom of a countersunkhead f 'of a bolt-hole f, formed through the head of the cylinder.

G indicates the squared end of the bolt, adapted to be engaged by awrench, and G is a binding-nut. This device is useful, as it avoids theuse of any device for holding the back bearing in position, which incase of its coming loose could fallinto the cylinder and cause breakageor trouble.

H is the detachable seat for the deliveryvalve, which is inserted andsecured in place in the opening F and is formed with an outwardlyextending flange H, which rests against the inside of the head, with aseat 11 for the delivery-valve, h indicating cross-bars of the seat, andthe seat being so arranged that the delivery-valve will seat itself withits face turned toward the cylinder. The seat H has also a flange Hwhich extends through opening F to which is secured a back bearing,(indicated at H I indicates-the admission-valve, and I thedelivery-valve.

J is the valve-rod of the admission-valve, and K the valve-rod of thedelivery-valve, the valve-rod K, as shown in Fig. 2, having attached toit a piston K situated in an actuating-cylinder, (indicated at M,) Mindicating a dash-pot cylinder at the end of the cylinder M. Theadmission-valve rod J is connected with the long arm of a three-armedlever J J J, the shorter arms J and J being symmetrically disposed oneach side of the pivot of the lever and having radially equidistant camcontacting faces or rollers situated in parallel planes, as is bestshown in Fig. 4. The three-armed lever is pivoted at its cylindricalbored hub J (see Figs. 3 and 4) on a bearing J eccentrically supported,as shown in Fig. 4, on a pin J j rotatably secured in thesupporting-arms L L.

J indicates a binding-screw, and it will be obvious that by turning thepin J j the pivot of the three-armed lever will be shifted, thusenabling compensation to be made for wear and a nice fit to be attained.The pivotal connection of the long arm J of the lever with the rod J isof a similar character, as shown in Fig. 4,'the end of the lever-arm Jbeing bifurcated and serving as a support for the pin J j having theeccentric bearing J formed in its center, upon which the rod J ispivoted. By shifting this hearing compensation can be made at this pointin the same way as described above.

j j indicate the cam-rollers on the leverarms J 2 J The arms L, alreadydescribed, serve also to support the bearings for avertical rotatingshaft P having, as shown, a miter-wheel P secured to the end of theshaft P and driven by a miter-wheel P, which, as shown, is secured onthe end of the main shaft of the englne.

L indicates the removable outer portion of the bearing, and P P indicatea pairof cams secured to the shaft P in such a position as to contactone with the cam-roller 7' and the other with the cam-roller f. Theshape of these cams is best shown in Fig. 3. They each consist of twooppositely-disposed segmental surfaces of different radius, those of theupper cam being indicated at o o and the similar surfaces of the lowercam being indicated at 12 These segmental portions of the cam areconnected by symmetricaloutlines, which in case of the upper cam areindicated at v and '0 and in case of the lower cam at v and t and theparts are so shaped and arranged, as shown in Fig. 3, that the one camroller will always pass from the higher to the lower segmental surfaceat the same time that the other cam-roller is passing from the lower tothe higher segmental surface, and vice versa, the cam-rollers alwaysremaining in contact with the surfaces of the cam upon which they work.

It will readily be seen that this device is of great simplicity andcompactness of construction, that it necessarily works with greatprecision, and results in a very rapid movement of the admission-valveboth in opening and closing.

Having now described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In a blowing-engine, the combination with the rod of a slidingair-admission valve of a three-armed pivoted actuating-lever J J Jpivotally attached by its arm J to the valve-rod and having on its armsJ J cam contacting faces or rollers 3' 7' arranged in parallel planesbut equidistant from the pivot of the lever, a positively-drivenrotating spindle P and cams P P secured on said spindle so as to actrespectively on the camrollers j j the cams and cam-rollers being soformed and arranged as to maintain contact between each cam and itsroller through the revolutions of the cams.

2. In a blowing-engine, the combination with the rod of a slidingair-admission valve of a three-armed adjustably-pivoted actuating-leverJ J J pivotally attached by its arm J to the valve-rod, and having onits arms J J cam contacting faces or rollers j 3 arranged in parallelplanes but equidistant from the pivot of the lever, a positively-drivenrotating spindle P and cams P P secured on said spindle so as to actrespectively on the cam-rollers 9' 9' the cams and cam-rollers being soformed and arranged as to maintain contact between each cam and itsroller throughout the revolutions of the cams.

3. In a blowingengine, the combination with the rod of a slidingair-admission valve .the revolutions of the cams.

CARL O. LINDROTH.

Witnesses:

JOHN W. GocHER, ALEX. K, HAMILTON.

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